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Although these medications are both vitamin D supplements, they are available in different strengths and have different indications, as well as different potencies and absorption. The most common strength is the source of confusion though: both vitamin D2 and vitamin D3 come in a 50,000 unit capsule.

So why the confusion?

The trouble with vitamin D2 vs D3 comes up when your doctor does not specify on your prescription which type of vitamin D he or she wants you to have. See More

20% – 50% of people living in the United States are low on vitamin D according to an estimate by the Endocrine Society, with even greater deficits in the elderly. Vitamin D is a hormone needed to absorb calcium and phosphorous. Without vitamin D, only 10% – 15% of calcium consumed can be absorbed, and only 60% of phosphorous. Vitamin D can be monitored through blood tests performed during a check-up with your doctor. See More

We all remember stories about people getting rickets from lack of vitamin D in the “olden days.” While that is almost unheard of in most developed countries, we are seeing many people with subclinical vitamin D deficiency. Vitamin D deficiency is associated with osteoporosis, increased risk of falls, and possibly fractures. Vitamin D is also believed to be important to the immune and cardiovascular systems, and a factor in breast cancer risk. See More

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